French President Francois Hollande welcomes his Iranian counterpart Hassan Rowhani for a meeting during the 70th U.N. General Assembly on September 27, 2015, in New York.

It is of vital importance to fight Islamic State of Iraq and Syria (ISIS) with “all our might”, Iranian President Hassan Rowhani told French President Francois Hollande on Tuesday, a day after Paris called for a grand coalition to destroy the group.

“President Rowhani … insisted on the vital importance of the fight against Daesch (ISIS) and terrorism with all our might,” a French presidential source said after a call between the two presidents.

The (two men) insisted on the importance of the Vienna peace talks to resolve the conflict in Syria, the source said.